Expand the following 1. (3xy + 2y)^2 Find the solution a^ -3 + a^-3 = ?
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Answered by
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1. (3xy+2y)² = [(3x+2)y]²
(3xy+2y)² = (3x+2)².y²
(3xy+2y)² = [ 9x²+2(3x)(2)+4]. y²
(3xy+2y)² = [9x²+12x+4].y²
(3xy+2y)² = 9x²y²+12xy²+4y²
2. a⁻³ + a⁻³ = (1/a³)+(1/a³)
a⁻³ + a⁻³ = 2/a³
Hope this wil help you .
(3xy+2y)² = (3x+2)².y²
(3xy+2y)² = [ 9x²+2(3x)(2)+4]. y²
(3xy+2y)² = [9x²+12x+4].y²
(3xy+2y)² = 9x²y²+12xy²+4y²
2. a⁻³ + a⁻³ = (1/a³)+(1/a³)
a⁻³ + a⁻³ = 2/a³
Hope this wil help you .
Answered by
1
Answer:
answer is, 9x²y²+12xy²+4y²
Step-by-step explanation:
hope it helps.
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